New Haven weather by month

Check out New Haven weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in New Haven (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
36°F maximum daytime temperature in January in New Haven36
37°F maximum daytime temperature in February in New Haven37
46°F maximum daytime temperature in March in New Haven46
57°F maximum daytime temperature in April in New Haven57
66°F maximum daytime temperature in May in New Haven66
77°F maximum daytime temperature in June in New Haven77
81°F maximum daytime temperature in July in New Haven81
81°F maximum daytime temperature in August in New Haven81
73°F maximum daytime temperature in September in New Haven73
64°F maximum daytime temperature in October in New Haven64
54°F maximum daytime temperature in November in New Haven54
39°F maximum daytime temperature in December in New Haven39
Min temperature (night-time)
21°F minimum night-time temperature in January in New Haven21
21°F minimum night-time temperature in February in New Haven21
28°F minimum night-time temperature in March in New Haven28
37°F minimum night-time temperature in April in New Haven37
48°F minimum night-time temperature in May in New Haven48
57°F minimum night-time temperature in June in New Haven57
63°F minimum night-time temperature in July in New Haven63
63°F minimum night-time temperature in August in New Haven63
55°F minimum night-time temperature in September in New Haven55
45°F minimum night-time temperature in October in New Haven45
36°F minimum night-time temperature in November in New Haven36
25°F minimum night-time temperature in December in New Haven25
Heat & Humidity
No heat & humidity in January in New Haven0
No heat & humidity in February in New Haven0
No heat & humidity in March in New Haven0
No heat & humidity in April in New Haven0
No heat & humidity in May in New Haven0
Low heat & humidity in June in New HavenL
Moderate heat & humidity in July in New HavenM
Low heat & humidity in August in New HavenL
No heat & humidity in September in New Haven0
No heat & humidity in October in New Haven0
No heat & humidity in November in New Haven0
No heat & humidity in December in New Haven0
Sea temperature
39°F sea temperature in January in New Haven39
36°F sea temperature in February in New Haven36
37°F sea temperature in March in New Haven37
43°F sea temperature in April in New Haven43
52°F sea temperature in May in New Haven52
63°F sea temperature in June in New Haven63
70°F sea temperature in July in New Haven70
72°F sea temperature in August in New Haven72
70°F sea temperature in September in New Haven70
63°F sea temperature in October in New Haven63
54°F sea temperature in November in New Haven54
46°F sea temperature in December in New Haven46

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in New Haven

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
10 hours of daylight per day in January in New Haven10
11 hours of daylight per day in February in New Haven11
12 hours of daylight per day in March in New Haven12
13 hours of daylight per day in April in New Haven13
15 hours of daylight per day in May in New Haven15
15 hours of daylight per day in June in New Haven15
15 hours of daylight per day in July in New Haven15
14 hours of daylight per day in August in New Haven14
12 hours of daylight per day in September in New Haven12
11 hours of daylight per day in October in New Haven11
10 hours of daylight per day in November in New Haven10
9 hours of daylight per day in December in New Haven9
UV Index (Maximum)
UV (maximum) index 2 (Low) in January in New Haven2
UV (maximum) index 2 (Low) in February in New Haven2
UV (maximum) index 4 (Moderate) in March in New Haven4
UV (maximum) index 6 (High) in April in New Haven6
UV (maximum) index 7 (High) in May in New Haven7
UV (maximum) index 8 (Very High) in June in New Haven8
UV (maximum) index 8 (Very High) in July in New Haven8
UV (maximum) index 8 (Very High) in August in New Haven8
UV (maximum) index 6 (High) in September in New Haven6
UV (maximum) index 4 (Moderate) in October in New Haven4
UV (maximum) index 2 (Low) in November in New Haven2
UV (maximum) index 1 (Low) in December in New Haven1

Rainfall in New Haven

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
10 days with some rainfall in January in New Haven10
10 days with some rainfall in February in New Haven10
11 days with some rainfall in March in New Haven11
10 days with some rainfall in April in New Haven10
11 days with some rainfall in May in New Haven11
11 days with some rainfall in June in New Haven11
9 days with some rainfall in July in New Haven9
9 days with some rainfall in August in New Haven9
8 days with some rainfall in September in New Haven8
7 days with some rainfall in October in New Haven7
11 days with some rainfall in November in New Haven11
12 days with some rainfall in December in New Haven12
Average monthly rainfall (inches)
3.2 inches monthly rainfall in January in New Haven3.2
3.2 inches monthly rainfall in February in New Haven3.2
4.0 inches monthly rainfall in March in New Haven4.0
4.0 inches monthly rainfall in April in New Haven4.0
3.5 inches monthly rainfall in May in New Haven3.5
3.0 inches monthly rainfall in June in New Haven3.0
3.3 inches monthly rainfall in July in New Haven3.3
3.7 inches monthly rainfall in August in New Haven3.7
3.3 inches monthly rainfall in September in New Haven3.3
3.4 inches monthly rainfall in October in New Haven3.4
4.1 inches monthly rainfall in November in New Haven4.1
3.9 inches monthly rainfall in December in New Haven3.9

More about New Haven

New Haven by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Connecticut (New Haven) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in New Haven?

New Haven has a cold climate with hot summers and some rainfall in all months.

Metric (°C)  |  Imperial (°F)

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Tropical storm risk: New Haven, Connecticut hurricane season

% of month affected by tropical storms
0
0
0
0
0
0
0
1.1%
1.7%
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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More about the USA

Compare New Haven with the USA

Below the New Haven chart shows average maximum daytime temperature for New Haven, Connecticut, USA and the USA (Washington).

Maximum daytime temperature (°F)

New Haven, Connecticut, USA
USA (Washington)
36
41
37
45
46
55
57
66
66
75
77
84
81
88
81
86
73
79
64
68
54
57
39
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

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